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more hash functions

This commit is contained in:
Sam Caldwell 2019-05-15 17:25:11 -04:00
parent 1590687e7a
commit 5310956848
2 changed files with 15 additions and 7 deletions
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12
racket/typed/examples/roles/flink.rkt
View File

@ -127,10 +127,10 @@ The JobManager then performs the job and, when finished, asserts (job-finished I
(define (word-count-increment [h : WordCount]
[word : String]
-> WordCount)
(hash-update h
word
add1
#;(λ x 0)))
(hash-update/failure h
word
add1
(lambda () 0)))
(define (count-new-words [word-count : WordCount]
[words : (List String)]
@ -168,9 +168,7 @@ The JobManager then performs the job and, when finished, asserts (job-finished I
(define wc (count-new-words (ann (hash) WordCount) (string->words data)))
(set! state (finished wc))]
[(reduce-work (bind left WordCount) (bind right WordCount))
;; TODO - this kind of hash-union
#;(define wc (hash-union left right #:combine +))
(define wc left)
(define wc (hash-union/combine left right +))
(set! state (finished wc))])
(set! status IDLE)]
[#t

10
racket/typed/hash.rkt
View File

@ -7,6 +7,8 @@
hash-ref
hash-has-key?
hash-update
(typed-out [[hash-update/failure- : (∀ (K V) (→fn (Hash K V) K (→fn V V) (→fn V) (Hash K V)))]
hash-update/failure])
hash-remove
hash-map
hash-keys
@ -15,6 +17,8 @@
hash-count
hash-empty?
hash-union
(typed-out [[hash-union/combine- : (∀ (K V) (→fn (Hash K V) (Hash K V) (→fn V V V) (Hash K V)))]
hash-union/combine])
)
(require "core-types.rkt")
@ -67,3 +71,9 @@
[hash-union : (∀ (K1 V1 K2 V2) (→fn (Hash K1 V1) (Hash K2 V2) (Hash (U K1 K2) (U V1 V2))))]
;; TODO - hash-union with #:combine
)
(define- (hash-update/failure- h k u err)
(#%app- hash-update- h k u err))
(define- (hash-union/combine- h1 h2 combine)
(#%app- hash-union- h1 h2 #:combine combine))